Sheetsxsheet i



Sept. 16, 1952 c. M. wHx-:ELocK 2,610,676

GAS BURNER WITH SECONDARY AIR FEED Filed Jan. 9, 1947 2 SHEETS-SHEET lDaz-5 ag M 'V1/779920011:

'M il Sept. 16, 1952 c. M. wHEELocK GAS BURNER WITH SECONDARY AIR FEED 2SHEETS-SHEET 2 Filed Jan. 9, 1947 Patented Sept. 16, 1952 UNITED STATESPATENT OFFICE ,GAS BURNER WIT AIR 9 Claims. l

This invention relates to gas burners and chiefly concerns gas .burnersof the type having a continuous discharge port extending about theperiphery of the burner head from which gas issues to burn in a flameextending uninterruptedly about the edge portion of the burner.

It is a general object of this invention to yprovide an improved gas'burner of the character described.

More specifically this invention has as its object the provision of agas burner of the character described having greatly increased port areaas compared with conventional burners ci the continuous port type.

Another object of this invention resides in the provision of a gasburner ci the character described with substantially ring-like portsspaced from one another around the periphery of the burner head from.which gas issues to burn in a iiame hollow at its base.

Still another object of this invention resides in the provision of a gasburner with a series of substantially ring-like ports spaced around theperiphery of the burner head and from which gas issues to burn in a'amehollow at its base wherein means is provided for Ysupplying secondarycombustion air to the hollow 'bases of said flames.

A further object :of this inventionresides in' the provision ofsubstantially ring-like ports for a gas burner of the characterdescribed connected with one another by narrow slit like ports so as toproduce a continuous port arrangement of substantial area extendingabout the entire periphery of the burner head.

Another object ofrthis invention resides in the provision of a gasburner-of the character described which readily lendsitself tofabrication from stampings for low cost production.

Another object. of this invention resides in the provision of a gasburner of ,thecharacter described having improved means for assuringsubstantiahy uniform distributionA of fuel 'to.'all of the ported areasof the burnen A In this respect it isV a further object of thisinvention to assure. uniform distribution of fuelto the peripheral portarrangementvof Vthe lburner by means of aV series ofcrcuniferentiallyspaced expansion chambers located ,nearl the peripheryof the burner head,l and by Supplying fuel to certain of said expansionchambers *froml a central rone of the head while supplying fuel directlyto one oi said expansion chambers from a point ad,- jacent to theperiphery o'f thefhead'. y

With the above and otherobl'ects in view, which will appear as thedescriptionv proceeds,` this in- H SECONDARY FEED vCarlton M. Wheelock,AMilwaukee, Wis.

vApplication January 9, 1947, Serial No. 720.996

`vention .resides in vthe novel construction, combination andarrangement of parts 'substantially as hereinafter described and moreparticularly defined by the appended claims, it being understood thatsuch changes in vthe precise embodiment of the Vherein disclosedinvention may be made as come'within the scope of the claims.

The accompanying drawings yillustrate `several complete examples of thephysical embodiment of the invention constructed according to the bestmodes so far devised for the practical application of they principlesthereof, and ingwhich:

Figure 1 is a plan view of the gas burner of this invention with partsthereof broken away and shown in section; f

Figure 2 is a longitudinal sectional view taken through Figure 1 alongtheplane of the line 2 2;

Figure 3 is an enlarged detail sectional view taken along the line '3-3of Figure 1;

Figure 4 is aplan view of a modified type of burner;

Figure 5 is a longitudinal sectional view of the burner of Figure 4taken along the plane of the line 5-5;

Figure 5a is an enlarged detail sectional view taken along thelineSuf-5a of Figure 4;

Figure 6 isa cross sectional view through the manifold tube of theburnerand taken along the line 6-6 of Figure 5; and

Figure 7 is an enlarged fragmentary sectional view illustrating a stillfurther modified form of the invention.

Referring now more particularly to the accompanying drawings, thenumeral 5 generally designates the gas burner of this invention. Theburner 5 comprises a substantially flat and nearly circular hollow headSincluding spaced apart upper and lower disc-like head forming members 1and 8, respectively, and a rim-like flange 9 extending between theperipheral edge portions of the upper and lower head vforming membersbut carried by the lower head forming member 8.

The upper and lower head forming members 11 and 8 are connected togetherin spaced apart relationship by means of upright tubular necks I0defining cored holes Il extending. vertically through the burner head.In the. present embodiment of the invention the head is 'shown with'three such tubular necks providing threey cored holes spacedsubstantially equal distances from one another about .a central zone ofthe head and lying close to the peripheral rim-like portions l2 of thehead. n

The three tubular necks. l0 cooperatev with one4 another to dene ineffect ahollow hub-like portion I3 at the central zone of the head andspokelike hollow passages I4 between adjacent necks. It will be notedthat the spoke-like passages I4 are substantially restricted but thatthe same lead to expansion chambers I5 adjacent to the junctures of thespoke-like portions of the upper and lower head forming members with therim I2 of the head and communicating with the hollow interior of the rimwhich likewise defines a restricted passageway' extending entirely aboutthe periphery of the head.

The lower head forming member 8 has one of its spoke forming sectionsdepressed outwardly as at I6 from a point adjacent to the innermost wallof one of the tubular necks IIJ rearwardly from said neck beneath thecentral zone I3 of the head and continued on between the remaining twonecks toward the rear periphery of the rim I2.

The depressed portion vI6 actually provides an inward extension of amanifold tube I8 joined to the rim I2 at the rear periphery of the headwith the upper portion of the manifold tube connecting with the flange 9and the lower portion of the tube in line with and forming a part theexpansion chamber I5 at the rear of the head so that said chamberreceives gas flowing along the upper portions of the tube while the gasilowing along the lower portions of the tube may pass beneath theexpansion chamber and be discharged directly into the central zone ofthe head at its hollow hub-like portion I3.

From Figure 2 it will be apparent also that the center line of themanifold tube I8 lies substantially in the plane of the lower headforming member 8 and that the upper portion of the tube is spacedslightly beneath the upper head forming member l.

A combustible gaseous mixture flowing through the tube toward the headfrom the inlet of the tube, as stated previously, initially enters thehollow interior of the head at the expansion chamber I5 alongside therear periphery of the head to be expanded upwardly and laterally thereinto opposite sides of the tube axis into the substantially restrictedpassage formed by the hollow interior of the rim I2 and leading betweenthe two real-most tubular necks II! and the flange 9.

The gaseous fuel entering the head is also conducted between and pastthe two rearmost tubular necks I to discharge into the central zone I3of the head and to impinge the foremost neck I0 whichraligns with theaxis of the manifold tube.

The gas delivered to the hollow hub-like central zone of the head isthereafter caused to travel substantially radially outwardly and for--vardly through the restricted passageways I4 of the hollow spoke-likeportions of the head to be delivered to the two expansion chambers I atthe front of the head.

The gas expands circumferentially in opposite directions from theseexpansion chambers into the hollow rim I2 with a portion thereoftraveling rearwardly and passing behind the rearmost tubular necks "l0and other portions traveling forwardly to pass ahead of the forwardtubular neck I0.

The result of introducing the gaseous fuel directly into the rearexpansion chamber I5 and at the same time to the central zone of thehead for distribution through the passages I4 formed by the hollowspokes is to create a substantially uniform gas pressure inside thehollow interior of the rim I2 from which the gas issues to burn in aflame of uniform height at the upper peripheral portion of the headthrough a peripheral port arrangement generally designated 22.

The peripheral discharge port arrangement is provided by relativelynarrow spaces 23 be tween the adjacent marginal edge portions of theflange 9 and the marginal edge portions of the upper head forming member'I. At circumferentially spaced points the spaces 23 are enlarged toprovide a series of holes 24 about the upper periphery of the head withadjacent holes joined to one another through the narrow slit-likeapertures 23, and with the holes and the apertures all leading to thehollow interior of the rim.

Secondary combustion air ducts or tubes 25 have their upper dischargeends disposed centrally in the enlarged holes 24 but spaced from thewalls of said holes so as to define substantially ring-like dischargeports through which gas in the hollow interior of the rim may issue toburn in a flame hollow at its base. These tubes have their lower endsseated in close fitting holes in the lower head forming member in whichthey may be press t or otherwise secured and so that their lower endsopen through holes 25 to the space beneath the burner head.

Hence, secondary combustion air is free to fiow upwardly through thesecondary air tubes 25 to be discharged into the hollow bases of flamesburning at the ring-like discharge ports 24.

It is also to be observed that the cored holes I I defined by thetubular necks I0 provide for the passage of secondary combustion airupwardly through the head to its top side so that the flames are fedwith secondary combustion air from inside the ring of flame; whilesecondary combustion air is free to flow up along the outer edge of theburner to provide an external source of air for the ring of flame.

Inasmuch as the narrow slit-like ports 23 are relatively short and thesubstantially ring-like ports 24 spaced substantially close togetherabout the periphery of the rim, it will be evident that a great increaseof port area is obtained over the conventional practice of providing buta single circular narrow discharge port extending continuously about theperipheral portions of the head.

Attention is also directed to the fact that the burner has no ring-likedischarge ports at the back thereof adjacent to the junction between therim I2 and the manifold tube I8 directly over the rear expansion chamberI5. The discharge port at this rear area of the head comprises arelatively long straight slit connecting the ringlike ports 24 lying atopposite sides of the axis of the manifold tube. Y

Inasmuch as substantially uniform gas pressure obtains within the hollowinterior of the rim I2, as previously stated, the llame which extendsuninterruptedly about the upper peripheral portion of the head will havesubstantially uniform height at all portions thereof.

In the Figure 1-3 embodiment of the invention described. a cast burnerhead construction has been illustrated, but the burner design hereinconcerned also lends itself readily to fabrication from stampings asshown in the Figure 4 7 embodiment of the invention.

The modified burner herein illustrated is subeerdere 5stantiallyzidentical to that previously ldescribed with the. exception.that the. ring-like. discharge ports 2'4. are not circular but areelongated or of substantially oval shape, although they can be circularifv desired. p

The burner head is likewise composed of upper and lower head formingmembers 1' and '.8'. respectively, but these members are made ofstampings having complementary neck` portions. I' pressed inwardlytherefrom andl telescoping together to form the secondary air holes Il,and to provide for joining the head forming members in spaced apartrelationship.

In this embodiment also. the lower head member is provided with a.flange 9 made as a. separate band attached to a short upstanding rim 3.9on the peripheral edge` portion of the lower head forming member. The.upper free edge of the band 9" likewise cooperates with the peripheraledge portions of the upper head forming ymember 1" to provide thealternate narrow and enlarged apertures as in the previous embodiment.y

The secondary air ducts 2 5', however, are. anchored. to the bottom headforming member 8' by being pressed into holes 3| formed in a horizontaledge portion of the lower head member.

The secondary air tubes 25 are pressed or brazed into these holes and itwill be noted that in the Figure 5 embodiment these tubes curveoutwardly toward their upper ends so that the ported surface or the headlies at an outward and downward angle.

The. depression I6'V of one of the spokes on the bottom of' the headforming member 8 is extended rearwardly beyond the rear edge of the headand formed to provide the lower half of the manifold tube i8 and to matewith the upper half of the tube which, as shown,v is carried by'andformed as a part of the rim flange 9'.

Near its junction with the head, the manifold' tube I8" is provided withan enlargement'33 dening a shoulder 34 facing the rim of the head. Theshoulder 34 acts as a stop to locate a flame arrester 35 located in theinner end portion of the manifold tube into which it is placed beforethe mating sections are assembled. The flame arrester 3,5' may be of'any desired design and its function is well known to those skilled inthe art and further description thereof isl deemed unnecessary.

6 Thus uniform penetration of brazing material into. the joints is`assured, v

In all embodiments of the invention, it is also highly important-from`the standpoint of scavenging the interior of the, burner when the supplyof fuel is shut. off that. both the upper and lower head forming membersbe. concave or saucershaped... as shown, with their hollow sides facingupwardly. Hence. all fuel in the hollow center portion of the head at,the time the fuel supply to. the burner is shut ofi flows, smoothly outwardly and upwardly to, discharge through the peripheral portarrangement Ywith little or no interference, from theI necks, lll. l

VrIhe objectionable popping of the burner at vshut-oil'. timev is. thuseliminated, as the readily escaping fuel continues to` burn smoothlyuntil all gas is exhausted from the head.

From, the foregoing description taken in connection4 with` theaccompanying drawings, it will be readily apparent to thosev skilled inthe art that this invention provides a highly improved burnerconstruction in which the` port area is greatly increased andwhichreadily lends itself to cast construction or to fabrication fromstampines..

What I claim as. my invention is:

1. A gas burner.. comprising: a hollow relatively flat burner headhaving a rim-like periphery; a plurality of apertures in the top wall ofthe. head adjacent to said rim-like periphery thereof adapted to,provide discharge ports through which gas admitted to the interior .0ithe. head issues to burn as al flame;I and hollow secondary air tubescarried by said head` adjacent to said rim-like periphery thereof withtheir lower ends seated and closely fitting in. holes in the bottom Inthe modification shown in Figure 7 the lower head forming member isprovided with a peripheral portion lying at an outward and downwardangle as in the Figurev 2 embodiment so that straight sided secondaryair tubes 25" may be pressed in suitable apertures therein to extend atan upwardlyl andoutwardly divergingangle producing a desirableprojection of the ame.

One highly important feat-ure of the fabricated burner of Figures 4 to'7 and which renders the Asame commercially successful, resides in thefact that all of the joints J `between the various stampingsfrom whichthe burner is made are brazed and have'their mouths M lying in parallelplanes. This enables use of simple overlapping joints if desired andfacilitates disposition of brazing wire into the mouths M of the joints.The brazing of all the joints accomplished simultaneously by disposingthe assembled burner in a brazing oven.f with the mouths of all of themating joints lying in a horizontal condition in which thev brazingmaterialis preventedfrom flowing lengthwise along the jointsin anobjectionable manner, as would inevitably occur with joints lying at anangle to the horizontal.

Wall of the head and their upper ends disposed substantially centrallyin Asaid apertures rbut spaced from the sides of said apertures so as tocooperate therewith, in the provision of. substantially ring-likedischarge ports for the burner.. said secondary air tubes being adaptedto conduct air from' beneath the headl upwardly through its hollowinterior for discharge into the hollow bases oi' names burning. at saidringlike ports.; and said top-wall of the head having relatively narrowslits. extending entirely therethrough and joining adjacent apertures soas to provide discharge means extending continuously around the top ofthe head.

2..y A gas burner comprising: superimposed dise-like stampings; meansjoining said stampings together in spaced apart relationship; a bandextending about the peripheral portions of said superimposed stampingswith its upper marginal edge. adjacent to Vbut spaced slightly from theperiphery of the. upper disc-like stamping; means joining the` loweredge of said band and the peripheral edge portion -of the lowerstamping; cooperating stamped extensions pro jeeting outwardly from thelower stamping and said band providing a manifold tube. by which a gasandl air mixture may be delivered to the space between said superimposedstampings to issue from the space defined between the upper edge of theband and the peripheral edge portionsr of the upper disc-likey stamping;and a joint. between adjacent edge portions of said manifold extensions.j y

3. The structure set forth in claim 2 wherein all of said joints arebrazed and have. their mouths accessible at theexterior of the burnerand lying in planes parallel to one another to allow disposition of theburner in a brazing oven with the 7 mouths of the joints in horizontalplanes to assure uniform penetration oi brazing material into thejoints.

4. A gas burner of the character described, comprising: a hollow headincluding spaced top and bottom head forming members; a substantiallyupstanding flange on the bottom head forming member extending upwardlyand having a substantially scalloped upper edge disposed adjacent to theperipheral edge of the upper head forming member to provide alternatenarrow and wide discharge openings about the periphery of the head; anda number of secondary air supply ducts, one for each of said widedischarge openings, seated in close fitting apertures in the lower headmember so as to open to the space beneath the head, and each having itsupper end centrally located in one of said wide discharge openings butspaced from the walls of said openings to define substantially ring-likedischarge ports connected by narrow slit-like ports through which gas inthe head issues to burn in a flame.

5. A gas burner, comprising: superimposed disc-like stampings;cooperating means on said stampings for joining the same together inspaced apart relationship and including wall portions extending acrosssaid space between the stampings for breaking up said space into aplurality of distributing passages communicating with one another at thecenter space between the stampings and extending radially outwardly indifferent directions from said center space, one of said passagesproviding an inlet through which fuel flows into the burner; a bandextending about the peripheral portions of said superimposed stampings;a connection between the lower edge of said band and the peripheral edgeof the lower stamping, the upper edge of the band having portionsadjacent to but spaced from the peripheral edge of the upper stamping soas to define a discharge port through which gas admitted to the spacebetween said stampings issues to be burned in a flame; and cooperatingstamped extensions projecting outwardly from the lower stamping and saidband, in line with said inlet passage, to provide a manifold tubethrough which gas is directly admitted to the ported portion at theouter end of the inlet passage and to the center space between saidstampings, the

lower stamping having a depression in line with its extension definingthe bottom of said inlet passage and leading inwardly to said centerspace between the stampings to insure gas entering said center space foroutward diversion through the remaining passages, thereby enabling evendistribution of such gas to the discharge ports.

6. A gas burner, comprising: a relatively fiat substantially hollowburner head; inner port forming members on the head spaced about theperiphery thereof; cooperating outer port forming members on the headsubstantially embracing said inner port forming members and spacedtherefrom to coact therewith in defining a multiplicity of substantiallyring-like ports through which gas delivered to the hollow interior ofthe head issues to burn in a flame hollow at its base; and means on theouter port forming members between adjacent inner port forming membersdefining relatively narrow slit-like discharge ports extending entirelythrough the head and connecting said ring-like ports, and through whichgas in the head issues to burn in a substantially fiat flame joining thesides of said hollow flames.

'7. A` gas burner of the character described, comprising: a headincluding an upper head member, a lower head member, and means joiningsaid head members together in spaced apart relationship comprising aplurality of tubular necks extending between said members and spacedfrom one another to define a number of distributing passagestherebetween leading outwardly from a central zone of the head, saidnecks also providing holes through the head for unrestricted passage ofsecondary combustion air upwardly through the burner head from beneaththe same; a multiplicity of ducts having their lower end portionsanchored in the lower head member to open to the space beneath the headand having their upper ends opening through apertures in the upper headmember larger than the upper extremities of the ducts to thereby providesubstantially ring-like discharge ports for the heads surrounding theupper extremities of the ducts through which gas fed to the interior ofthe head issues to burn in flames hollow at their bases with said flamessupplied with secondary combustion air through the ducts leading to theinterior of the flames; and means on said head defining a manifold tubeleading to the interior of the head, the inner end portion of saidmanifold tube extending partly beneath the lower head member and beingin direct communication with the space between said head members andwith one of said distributing passages to assure gas delivered to thehead entering the same substantially simultaneously at said central zoneof the head and at the periphery of the head adjacent to the outer endof said designated distributing passage for uniform distribution in alldirections toward the discharge ports; and relatively narrow slitsextending entirely through said top head member, and connecting adjacentring-like ports with one another, and from which gas in the head issuesto burn in a relatively flat flame.

8. A gas burner of the character described comprising: a manifold tube;a hollow burner head including upper and lower disc-like head formingmembers joined together in spaced apart relationship, the lowerdisc-like member being formed with an outwardly depressed portionleading rearwardly to the edge of the head from a central zone of thehead; a connection between the manifold tube and the rear edge of thehead disposing the manifold tube in alignment with said depressedportion of the lower head forming member so that said depressed portionacts as an inward continuation of the lower portion of the manifold tubewhereby a gaseous fuel ilowing through the manifold tube may bedelivered substantially simultaneously to said central zone in theinterior of the head and to the interior of the head at the rearthereof; a plurality of obstructions in the hollow interior of the headpositioned to be impinged by gas entering the head for effectingsubstantially uniform distribution of the fuel outwardly in differentdirections from said central zone and toward the edge portions of thehead, one of said obstructions being positioned forwardly of saidcentral zone of the head and in line with the manifold tube so as toprevent direct flow of fuel to the front edge of the burner head:cooperating jet forming elements on said head defining substantiallycircumferentially spaced enlarged apertures opening to the top edgeportion of the head joined by relatively narrow slits extending entirelythrough the top member of the burner head with said slits and aperturesbeing arranged alternately and continuously about the upper edge portionof the head; and secondary air supply ducts seated in close fittingholes in the lower head forming member beneath said enlarged aperturesand leading upwardly through the head to have their discharge endslocated centrally in said enlarged apertures but spaced from the wallsof the apertures so that said walls of the apertures and the exteriorsof the ducts at their discharge ends produce substantially narrowdischarge ports encircling the discharge ends of said ducts with saidports spaced from one another about the edge of the head and joined withone another by said narrow slits.

9. In a gas burner of the character described: a burner head having ahollow central portion and a hollow rim surrounding said centralportion; means defining a substantially radial inlet fuel passage in thehead, the inner end of said passage terminating at the central portionof the head and the outer end thereof opening through and communicatingwith the rim at the rear edge of the head; means on said rim defining aperipheral port arrangement through which a gaseous fuel admitted intothe rim issues to burn in a flame; a manifold tube joined to the rim atthe rear of the head and in line with said passage to constitute anoutward continuation of the latter, whereby the tube conducts fueldirectly to the rim at the rear of the head, and also conducts fueldirectly to the central portion of the 10 head; and means defining othersubstantially radial diverting passages in the head communicating withthe inner terminus of said rst designated passage with their axessubstantially crosswise of the axis of said first designated passage fordirecting al1 of the fuel brought to said central portion of the headtoward circumferentially spaced portions of the rim near the front ofthe head.

CARLTON M. WHEELOCK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 399,948 Tibbens Mar. 19, 1889541,212 Pettibone June 18, 1895 663,560l Colver Dec. 11, 1900 839,454Clunies Dec. 25, 1906 1,014,932 Antonuccio Jan. 16, 1912 1,399,178 WoliDec. 6, 1921 1,942,397 Cuyler Jan. 9, 1934 2,294,392 Egger Sept. 1, 19422,302,505 Rayniak Nov. 17, 1942 2,396,800 Mills Mar. 19, 1946 FOREIGNPATENTS Number Country Date 543,548 Germany Feb. 6, 1932 526,476

Great Britain Sept. 19, 1940

